I saw something similar to this on a very expensive photography prop website. I also saw a glimpse of a version of this on the prop junky website. My mind started spinning and I came up with an inexpensive substitute for those very expensive ($129) backdrop stands- To make your own you will need:
portable clothes rack from Ross ($12)
curtain rings with clip attachments,
four or five 2 inch clamps from Home Depot ($1 each).
Assemble the clothes rack as directed. Before attaching the top cross bar slip on about ten curtain rings-on the bar where the hangers would go. Finish assembling the clothes rack.
This adapted "photography stand" has wheels so it is easy to move. It can hold several backdrops at once and those can be switched out without too much trouble- especially if you use curtain rings with clips attached (I just used what I had in my crafty junk box).
For the actual backdrops I've used curtain panels, blankets and pieces of fabric cut to size. For a beginner with a tiny budget it works pretty well!
Oh, this won't work for a tall adult unless he's sitting--- but maybe you could use pvc pipe to make the stand taller. Still beats the $129 price tag.